Insects like, cockroach and silverfish have which of the following respiratory pigments?

Options

A. Haemoglobin
B. Haemocyanin
C. Erythrocruorin
D. None

Answer

To solve the question regarding the respiratory pigments found in insects like cockroaches and silverfish, we can follow these steps:

### Step 1: Understand the Question
The question asks which respiratory pigment is present in insects such as cockroaches and silverfish.

### Step 2: Identify the Options
The options provided are:
1. Hemoglobin
2. Hemocyanin
3. Vitrochlorin
4. None

### Step 3: Analyze Each Option
- **Hemoglobin**: This is a well-known respiratory pigment found in vertebrates, not in insects. Therefore, it is not the correct answer.

- **Hemocyanin**: This is a copper-containing protein that serves as a respiratory pigment in many arthropods, including insects. It is responsible for transporting oxygen in their hemolymph (the insect equivalent of blood).

- **Vitrochlorin**: This pigment is not commonly associated with insects; it is found in some annelids. Thus, it is not the correct answer.

- **None**: This option would imply that there are no respiratory pigments in cockroaches and silverfish, which is incorrect since they do have hemocyanin.

### Step 4: Conclusion
Based on the analysis, the correct answer is **hemocyanin**, as it is the respiratory pigment found in cockroaches and silverfish.

### Final Answer
The correct option is **hemocyanin**.

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